Toshiba VF-A7 Application and functions of options, Sorts of separate-type options

9. 4 Application and functions of options

Separate type options shown below are prepared for the inverter VF-A7

③High attention radio

②DC reactor

(DCL)

noise

filter

⑤Zero-phase reactor

ferrite

core

type

⑦Braking

resistor

radio

noise

filter

Magnetic

⑥EMI filter for CE

⑧Motor noise

compliance

reduction filter

Power supply

conductor

motor

(MC)

VF-A7

N.F.

N.F.

IM

Molded case

circuit

breaker

(MCCB)

①Input AC reactor

⑤Zero-phase

⑨Motor end surge

(ACL)

reactor

voltage suppression

④Simple radio

ferrite

core

filter (for 400V

type radio

models only)

noise filter

noise

filter

⑩Control power

Sorts of separate-type options

converter unit

No.

Option name

Function, purpose.

To be used for improvement of input power-factor of the inverter power source, for reducing

higher harmonic or suppressing external surge. The input reactor can be installed when the

power capacity is 500 kVA or more and it is 10 times or more as high as the inverter capacity

Input

AC reactor

or there are some source distorted wave generation such as a thyristor, etc. and a high

①

capacity inverter connected with the same distribution system.

(ACL)

Type of reactor

Effect

Power-factor

Harmonic suppression

External surge

improvement

200 V, 3.7 kW or less

Other combination

suppression

Input AC reactor

Effective

Effective

Effective

Effective

DC reactor

Very effective

Effective

Very effective

Not effective

②

DC reactor(DCL)

The DC reactor is superior to the input AC reactor in power-factor improvement. For the

inverter system that is required to be high reliable, it is recommended to use the input AC

reactor that effectually suppresses external surge together with the DC reactor.

High attenuation

･ Effectual to prevent audio equipment used near the inverter from radio interference.

radio noise filter

･ Install this filter in the inverter’s input side.

③

(LC filter) NF type,

･ Excellent attenuation characteristic for wide frequency band from AM radio band nearly to

(manufactured by

10 MHz.

filter

Soshin Electric

･ To be used when electric appliances that are easily affected by noise are installed in the

Co., Ltd.)

periphery of the inverter

reduction

Simple radio noise

･ Effectual to prevent audio equipment used near the inverter from radio interference.

filter (capacitive

･ Install this filter in the inverter’s input side.

④

filter)

･ Attenuation characteristic for a certain frequency band. Effectual for noise reduction of

noise

(Manufactured by

specific AM radio broadcastings (weak radio wave in mountain area).

Malcon Electronics

･ Leak current increases because of the condenser type. If ELCB is installed in the power

Radio

Co., Ltd.)

supply side, avoid using multiple units.

Zero-phase reactor

･ Effectual to prevent audio equipment used near the inverter from radio interference.

(Inductive filter)

･ Effectual to reduce noise in the input and output sides of the inverter.

⑤

(Ferrite core type,

･ Excellent attenuation characteristic for several decibels in wide frequency band from AM

manufactured by

radio band nearly to 10 MHz.

Soshin Electric

Co., Ltd.)

If EMI filter is installed in proper connection, the inverter has consistency with EMC

⑥

EMI filter for CE

commands. However, installation of EMI filter is not required for the inverters of 200 V, 0.4-

compliance

7.5 kW or 400 V, 0.75-15 kW models, because those models have built-in noise filters as

standard specifications.

To be used to shorten deceleration time for the reason of frequently operated quick

⑦

Braking resistor

deceleration and suspension or high inertia load. This increases consumption of

regenerative energy in dynamic braking.

Resistor and protective thermal relay are built in.

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